Depression during pregnancy

I want to attach a text I sent to my husband. Last weekend I finally broke down and told him about the suffering I’ve been going through. I didn’t want to look weak in front of someone whose always bring so strong to me. Which, I think is part of this whole thing. He was absolutely the most supportive and loved me, hugged me, told me everything was fine and we will get me the help I need. After seeing his support and finally talking it through, I felt so much better. I have had the best week, until last night. I had another episode out of nowhere over something very small. I don’t know how else to explain it. I’m scared he won’t understand (also I think that’s another one of those depression thoughts)